| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| CAELESTIS | - | Late Roman | ||
| CAELINUS | - | Ancient Roman | ||
| CAELIUS | - | Ancient Roman | ||
| CAERWYN | - | Welsh | ||
| CAESAR | SEE-zər (English) | Ancient Roman | ||
| CAESARIUS | - | Late Roman | ||
| CAETANO | - | Portuguese | ||
| CAHAL | - | Irish | ||
| CAHIR | - | Irish | ||
| CAI (1) | - | Swedish, Norwegian, Danish | ||
| CAI (2) | - | Welsh Mythology, Arthurian Romance | ||
| CAIAPHAS | KAY-ə-fəs (English), KIE-ə-fəs (English) | Biblical | ||
| CAIDEN | KAY-dən | English (Modern) | ||
| CAIETANUS | - | Late Roman | ||
| CAILEAN | KA-len | Scottish |